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Commit cd926f85 authored by Milan's avatar Milan
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FAQ

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faq.md 0 → 100644
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languages:
- en
- cs
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# FAQ - Frequently Asked Questions
Frequently asked questions can be found in the [Data Storage documentation](FAQ - Frequently Asked Questions).
......@@ -166,8 +166,11 @@ Volume unmapping.
To get better performance choose appropriate size of `read_ahead` cache depends on your size of memory.
Example for 8GB:<br/>
echo 8388608 > /sys/block/rbd0/queue/read_ahead_kb
Example for 512MB:<br/>
echo 524288 > /sys/block/rbd0/queue/read_ahead_kb
To apply changes you have to unmap image and map it again.
......@@ -233,7 +236,7 @@ This command should execute if the dependencies are set correctly `umount`, LUKS
(alternatively `systemctl stop ceph-rbdmap.service`)
### Resize
### Image resize
When resizing an encrypted image, you need to follow the order and the main one is the line with cryptsetup `--verbose resize image_name`.
rbd resize rbd_pool_name/image_name --size 200T
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